/* =========================================
   完美体育 — 全站共享样式 /assets/site.css
   ========================================= */

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  background-color: #0B1F1A;
  color: #F2F7F2;
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
button,
textarea,
select {
  font: inherit;
}

a {
  color: #00E07C;
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover,
a:focus-visible {
  color: #FF6C2F;
}

ul,
ol {
  list-style: none;
}

p,
li,
blockquote {
  font-weight: 400;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Politica', 'DIN Alternate', 'Helvetica Neue', sans-serif;
  font-style: italic;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

/* ---------- CSS Variables ---------- */
:root {
  --color-bg: #0B1F1A;
  --color-bg-translucent: rgba(11, 31, 26, 0.6);
  --color-overlay: rgba(0, 0, 0, 0.6);
  --color-primary: #00E07C;
  --color-primary-soft: #00B3A6;
  --color-accent: #FF6C2F;
  --color-wine: #B3375C;
  --color-purple: #7A4FFF;
  --color-text: #F2F7F2;
  --color-text-muted: #A0B0A8;
  --color-border: rgba(242, 247, 242, 0.14);

  --font-heading: 'Politica', 'DIN Alternate', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-index: 0.8125rem;
  --radius-large: 28px;
  --radius-small: 14px;
  --radius-pill: 999px;

  --container-width: 1200px;
  --header-height: 78px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.3);
  --transition: 250ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ---------- Focus ---------- */
:focus-visible {
  outline: 2px solid #FF6C2F;
  outline-offset: 4px;
  border-radius: 4px;
}

/* ---------- Layout Container ---------- */
.container {
  width: min(100% - 40px, var(--container-width));
  margin-inline: auto;
}

/* ---------- Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  padding: 10px 20px;
  background: #00E07C;
  color: #0B1F1A;
  font-size: 14px;
  font-weight: 700;
  border-radius: 0 0 12px 12px;
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 0;
  color: #0B1F1A;
}

/* =========================================
   页头 — 左右分置导航
   ========================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 31, 26, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 224, 124, 0.18);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 2rem;
}

/* 品牌 */
.brand-logo {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
  flex-shrink: 0;
  padding: 6px 0;
}

.brand-logo__primary {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 900;
  font-size: 1.75rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
  text-shadow: 0 0 20px rgba(0, 224, 124, 0.35);
}

.brand-logo__primary::first-letter {
  color: var(--color-primary);
}

.brand-logo__sub {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.brand-logo__sub--cn {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

/* 导航区 */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 14px;
  background: rgba(0, 224, 124, 0.1);
  transition: background var(--transition);
}

.nav-toggle__line {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, background 0.3s ease;
}

.nav-toggle__text {
  display: none;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(0, 224, 124, 0.2);
}

/* 主导航 */
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.primary-nav__link {
  display: inline-block;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text);
  border: 1px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.primary-nav__link:hover,
.primary-nav__link:focus-visible {
  color: var(--color-primary);
  background: rgba(0, 224, 124, 0.08);
  border-color: rgba(0, 224, 124, 0.3);
  transform: translateY(-2px);
}

.primary-nav__link[aria-current="page"] {
  color: var(--color-primary);
  background: rgba(0, 224, 124, 0.12);
  border-color: rgba(0, 224, 124, 0.4);
  box-shadow: 0 0 16px rgba(0, 224, 124, 0.15) inset;
}

/* =========================================
   页脚 — 品牌 + 联系 + 合规
   ========================================= */

.site-footer {
  background: #07150F;
  border-top: 1px solid rgba(0, 224, 124, 0.16);
  position: relative;
  overflow: hidden;
  margin-top: auto;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-soft), var(--color-wine), var(--color-purple));
  opacity: 0.6;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 2.5rem;
  padding: 3.5rem 0 2rem;
}

.site-footer__logo {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.site-footer__logo-primary {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 900;
  font-size: 1.6rem;
  color: var(--color-text);
}

.site-footer__logo-sub {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.site-footer__trust {
  margin-top: 0.8rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  max-width: 38ch;
}

.site-footer__columns {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
}

.site-footer__heading {
  font-size: 0.9375rem;
  font-weight: 800;
  font-style: italic;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid rgba(0, 224, 124, 0.2);
  display: inline-block;
}

.site-footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer__item a {
  color: var(--color-text-muted);
}

.site-footer__item a:hover {
  color: var(--color-primary);
}

.site-footer__note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.site-footer__link {
  color: var(--color-text);
  font-weight: 500;
}

.site-footer__link:hover,
.site-footer__link:focus-visible {
  color: var(--color-primary);
}

.site-footer__bottom {
  background: rgba(0, 0, 0, 0.25);
  padding: 0.9rem 0;
  border-top: 1px solid rgba(242, 247, 242, 0.06);
}

.site-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.site-footer__copyright,
.site-footer__icp {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.site-footer__icp {
  color: var(--color-text-muted);
  transition: color 0.25s ease;
}

.site-footer__icp:hover {
  color: var(--color-primary);
}

/* =========================================
   通用排版 & 基础组件
   ========================================= */

/* 滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 999;
  border-radius: 0 99px 99px 0;
  pointer-events: none;
}

/* 底色渐变光晕背景 */
body::before {
  content: "";
  position: fixed;
  top: -20%;
  right: -10%;
  width: 80vw;
  height: 80vw;
  max-width: 700px;
  max-height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(0, 179, 166, 0.14) 0%, rgba(0, 179, 166, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  bottom: -15%;
  left: -10%;
  width: 60vw;
  height: 60vw;
  max-width: 550px;
  max-height: 550px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(255, 108, 47, 0.1) 0%, rgba(255, 108, 47, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* 内容层叠加 */
#main-content {
  position: relative;
  z-index: 1;
}

/* 页面基础间距 */
.page {
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(3rem, 6vw, 5rem);
}

/* 面包屑 */
.breadcrumb {
  padding: 1rem 0 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li + li::before {
  content: "→";
  color: var(--color-accent);
  font-size: 0.75rem;
  opacity: 0.7;
}

.breadcrumb a {
  color: var(--color-text-muted);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb span[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

/* 按钮 */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.8rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-soft));
  color: #0B1F1A;
  box-shadow: 0 8px 20px rgba(0, 224, 124, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 224, 124, 0.3);
  color: #0B1F1A;
}

.btn-secondary {
  background: transparent;
  color: var(--color-wine);
  border: 2px solid var(--color-wine);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  background: rgba(179, 55, 92, 0.1);
  color: var(--color-wine);
}

/* 编号章节 */
.section {
  margin-bottom: 3.5rem;
}

.section-header {
  display: flex;
  align-items: flex-end;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.section-index {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 900;
  font-size: 3rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  opacity: 0.75;
}

.section-title {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
  border-left: 3px solid var(--color-primary);
  padding-left: 0.8rem;
  margin-bottom: 0.2rem;
}

.section-description {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  max-width: 60ch;
  margin-top: -0.4rem;
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card-item {
  background: linear-gradient(160deg, rgba(0, 179, 166, 0.06), rgba(0, 0, 0, 0.15));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  padding: 1.75rem;
  transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.card-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-soft));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card-item:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 224, 124, 0.3);
  background: rgba(0, 224, 124, 0.04);
  box-shadow: var(--shadow-card);
}

.card-item:hover::before {
  transform: scaleX(1);
}

.card-index {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-purple);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.card-title {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.24rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.card-desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* 胶囊标签 */
.pill-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: rgba(0, 224, 124, 0.1);
  border: 1px solid rgba(0, 224, 124, 0.25);
}

.pill-tag--orange {
  background: rgba(255, 108, 47, 0.12);
  border-color: rgba(255, 108, 47, 0.3);
  color: var(--color-accent);
}

.pill-tag--wine {
  background: rgba(179, 55, 92, 0.14);
  border-color: rgba(179, 55, 92, 0.3);
  color: var(--color-wine);
}

.pill-tag--purple {
  background: rgba(122, 79, 255, 0.14);
  border-color: rgba(122, 79, 255, 0.3);
  color: var(--color-purple);
}

/* 图片容器基础规则 — 页面阶段放入实际图片 */
.image-opportunity {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: linear-gradient(120deg, rgba(0, 179, 166, 0.1), rgba(0, 0, 0, 0.2));
  border-radius: var(--radius-large);
  border: 1px solid var(--color-border);
}

.image-opportunity::before {
  content: "";
  display: block;
  padding-top: 62.5%;
}

.image-opportunity > img,
.image-opportunity > picture,
.image-opportunity > canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 正文容器 */
.formatted-body {
  max-width: 70ch;
  display: grid;
  gap: 1.25rem;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.8;
}

.formatted-body h2 {
  font-size: 1.6rem;
  color: var(--color-text);
  margin-top: 1rem;
}

.formatted-body h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-top: 0.6rem;
}

.formatted-body p {
  color: var(--color-text-muted);
}

.formatted-body ul {
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.formatted-body ul li {
  display: flex;
  gap: 0.6rem;
}

.formatted-body ul li::before {
  content: "◆";
  color: var(--color-accent);
  font-size: 0.8em;
  flex-shrink: 0;
  line-height: 2;
}

.formatted-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.formatted-body blockquote {
  padding-left: 1.2rem;
  border-left: 3px solid var(--color-wine);
  color: var(--color-text);
  font-style: italic;
}

/* 网格背景覆盖图层 */
.grid-overlay {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(0, 224, 124, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 224, 124, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.6;
}

/* 滚动数据条 */
.ticker-bar {
  display: flex;
  align-items: center;
  gap: 2rem;
  overflow: hidden;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-small);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(0, 224, 124, 0.1);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.ticker-bar__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-text);
}

.ticker-bar__item strong {
  color: var(--color-primary);
  font-weight: 700;
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 48px;
  height: 48px;
  background: rgba(0, 224, 124, 0.12);
  border: 1px solid rgba(0, 224, 124, 0.35);
  border-radius: var(--radius-small);
  color: var(--color-primary);
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  backdrop-filter: blur(8px);
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: rgba(0, 224, 124, 0.24);
  color: var(--color-text);
}

/* 移动端导航开合状态 */
@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .site-header__inner {
    gap: 0.75rem;
  }

  .site-header__nav {
    position: static;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .site-footer__columns {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 32px, var(--container-width));
  }

  .site-header__inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding: 8px 0;
  }

  .brand-logo__primary {
    font-size: 1.35rem;
  }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 16px;
    right: 16px;
    background: rgba(11, 31, 26, 0.9);
    backdrop-filter: blur(16px);
    border-radius: 0 0 var(--radius-large) var(--radius-large);
    border: 1px solid rgba(0, 224, 124, 0.2);
    border-top-color: var(--color-accent);
    padding: 0.8rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    z-index: 90;
  }

  .primary-nav[data-open="true"],
  .site-header__nav[data-open="true"] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .primary-nav__link {
    display: block;
    padding: 14px 16px;
    text-align: center;
    font-size: 1.0625rem;
  }

  .site-footer__columns {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer__inner {
    padding-top: 2.5rem;
    gap: 2rem;
  }
}

/* 平板与窄桌面适配 */
@media (min-width: 621px) and (max-width: 1024px) {
  .brand-logo__primary {
    font-size: 1.4rem;
  }

  .primary-nav__link {
    padding: 8px 12px;
    font-size: 0.875rem;
  }

  .site-footer__columns {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

/* 无障碍：减弱动画 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  html {
    scroll-behavior: auto;
  }
}